Spool-retarding device for tube frames



Dec. 11, 1 28. 1,694,881

- C. LEA

SPOOL RETARDING DEVICE FOR TUBE FRAMES Fiied April 1, 1927 INVENTOR.

ABTTORNEKI '25 the spool and produce an] excessi e and un- Patented Dee; 11,1928;

cHAR'nEst EA, or mrijron', M ssAcHusEETTs, Assm von r sHAwMur ENGINEERING l columnar, OFBOSTON; MASSAQIfflSETTSgJi"GORPOBATION OF-MASSAGHUSETTS.

1 sroonenraitncrne DEV-16ETbR TiTBE'ERAMiEs; 3 1 a uch spooleretarding vmeans have very commonlyconsisted of'an 'arm or leaf spring secured :to the carrier-bar or frame of the tube frame so that its free endnorinally fpressestoward the spool head torreate'frictional resistance to :the spool rotation, said free end having riveted thereto a friction ,pad' of leather, raw-hide'or other non-metallic substancesuitablefor usefas a brake shoe," H Since" the rivets pass throughboth the spring :arm and pad and are only slightly countersunk or. de res'sed below the surface 'of the pad, the aziiwears down very quickly seas to expose the jrivetsgtocontact with the, spool-with the consequence that such'exposed rivetsscrap'e or s rateh'into the wooden spoolhead, thusjhaving a tendency to catch against.

evenor jerkyr tardatiqin thereby preventing the JOQth ven rotation .ofthe spool under funiform resistancg whieh is' requisite for the pro ferdeiiveryidf'theiysm. 1 I 2o 'oreover', {underfjprevailifng practice, the replacement ofa worn aidin VQ'lVGd fillng fOIt cutting'the rivets and 'o'ring' out n'e w pajds .f rne ve as e -esthe eiv f lng T P- eration itself" so that the-r pairer replacement of the pads is as-expensiveas are'entirely newbrakeelements. 7

With a view ,to' Overcoming these and'other practical difficulties experienced with these devices as heretofore constructed, Ihave provided a new construction of spool-retarding device which utilizes theflexible arm and a friction pad, but which secures them together without rivets orother fastening means that will produce a jerky orfuneven retardation when the padbecomes worn and that not only greatly prolongs the lifeor duration of the pad'itself, but renders it easy of application and of withdrawal for reversal or replacement so that nearly the entire thickness of the pad may be utilizedto withstand wear, while anew pad may be almost instantly substituted for a worn out pad. 1 y I This and other features of the inventionwill Y be described in the following specification and will be definedin the claims hereto. annexed.

" end is liel r a r I p j Tothe topofthe'carrier bar l is secureda in position to 192 .1, .seriai 'iioi eoata 1 invention; in which: I v we a p a I Figure l'is a front-el vation ofonejend of a tube-frame showing the spool-retarding device'secured to the tube fra'me inoperative en 'agementwith thehead of the yarn-spool. igure 2'i-sa planviewjof the flexibl'e arm cured to whiCht-he frictionpad is'detachably sef f "Fi ure 3,is; an end elevations of'the fric f P'AI E'NT,orrics;1;;

f Iiitheaccompanyingdrawings I have v trate'dan' inexpensivejform embodyingt'he tion pad itself as used in thisfformofthe invention; g p p The tube'jframe illustrated in the drawlngs 1s .ofa well known construct on and embraces the yarn guidingtufttubes 2; and to whose from the'carrier-chains, in the usualifashion.

.70 i a tubular carrier-bar 1, towhichfare secured 1 secured asuspension spool-bearing bracket 3, ocarryinga pivotal lat'chfor hooks}, Y foo-acting with the-upward'extension of the bracket to releasably suspend the tube-frame Theyv lnpOOl 5'has-itspjournalmounted a in a lb'earing ear rotatable support as ski -b le armZpreferalo'lyofispring steelrhaving near its inner end fan aperture for a fasf te'ning screw 8,ja nd"h'aving, beyond said fastening screw a hoo'k like tongue 7 offset from theplane oftheadjace'nt end ofthe arm so as Q "to hook through an aperture '1 wall of the carrier-bar'f'of' the tube "frame.

When" thus hooked in' place the fastening screw is screwed into the top of the carrier yarn spool.

. The er free. end of the arm 7is re-r- V 7 cessed toreceive afriction pad so as to form interlocking engagement therewith and yet permit tea y removal of the 'frictionpad for replacement or, 'rev'ersal.-' V In the present form of theinvention the recess is formed by slotting the free end of-the arm 7 inwardly and forming the opposite sides of the slot with serrated or hook-like teeth 7*, inclined inwardly so asto facilitate the insertion of the pad andyet counter-act any tendency of thepad to workoutof the slot in the reverse direction. fAs shownr in v Figure 3; the pad 9 isof considerably greater thickness than the thicknessof the arm 7 and is provided on its opposite edge, faces with slots 9.of sufficient width and depthto re- 90 bar, leavingthe free endpf the -'carr-ier;-bar 'p're'sseligainstgthe headf5o flthe' I ceive the serrated teeth 7" whenthe pad is driven or forced into the slot from its open end. The pad being made of compressible or somewhat yielding material, such as leather, raw-hide, vulcanized rubber or other suitable material, when forced between the gripping jaws of the arm 7, is slightly indented by the serrations or teeth which thus form an interlocking engagement suflicient to revent any accidental displacement of the iction pad through service stresses, while at the same time allowing the pad to be withdrawn by means of a pair of pliers for reversal or replacement; As both sides of the pad are made alike, and each side projects considerably beyond the adjacent surface of the brakearm, it will be seen that as the pad wears down on one side it may be withdrawn and reinserted with its upper and lower faces reversed so as to continue to wear until the pad is worn out which, in like manner, can be withdrawn for replacement of a new pad of similar construction. By this arrangement not only is the uneven or jerky action prevented, due to wearing the pad down to the oint where the former rivets engaged the spooli but the life or duration of the pad is great may be used indefinitely with new pads without be'ng discarded, as heretofore, when the pad wears out. i i

What I claim is a 1. A s ool-retarding device for a tubeframe em racing a fiexlble arm adapted to be secured to a tube-frame with its free end normally pressed toward a yarn-spool therein, said arm being slotted inwardly from its free end to form a pad-receivin recess having serrated sides, a non-metallic friction pad having oppositely disposed external grooves for engagement with the serrated edges of said recess to retain the pad in its operative position while allowing it to be withdrawn therefrom.

2. A spool retarding device for a tube frame embracing in itsconstruction a flexible y prolonged, while the same brake arm interior 1,694,881 r a ,v I 7 posed gripping jaws, a non-metallic friction pad forced into said recess between said jaws and interlockingly engaged therewith to prevent accidental removal, while permitting the pad to be released therefrom for replacement or reversal.

3. The combination with a tube frame carrier bar and its overhead yarn spool, of a spool retarding arm of sheet metal, one end of which is adapted to be secured to the top face of the carrier bar with its free end projecting upward against the head of a yarn.

spool, said free end being recessed inwardly from its outer end to form substantially parallel spring jaws, and a tight fitting pad of non-metallic material whose opposite side edges are grooved to form telescoping and overlappingengagement with said jaws to hold it against accidental displacement, while permitting its instant removal and replacement. a a.

4. The combination with a tubular tube frame carrier bar'and its overhead supported yarn spool, a leaf spring arm whose inner" end is formed with an offset extension adapted to be inserted throughan aperture in the top wall of the carrier bar, an anchoring screw passing through said arm adjacent to said offset end to anchor it firmly to the tube frame, the free end ofsaid arm being recessed to form parallel gripping jaws, and a spool engaging pad tightly inserted betweensaid ripping jaws with its upper and lowersuraces pro ecting a substantial distance beyond the plane of the surroundingportion of said arm. a

In witness whereof, I have subscribed the above specification.

CHARLES LEA. 

